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US 11,724,339 B2Granted
Method for producing a drill shaft for a wet drill bit
AssigneeHilti Aktiengesellschaft
InventorsFlorian Schroeder, Christoph Weber, Roland Schneider
Life of this patent
Estimating the term…
Abstract
A method for producing a drill shaft for a wet drill bit includes forming N, where N≥1, strip materials into a tubular body where the tubular body is integrally joined at strip edges of the strip materials by N connection welds. At least one strip material of the strip materials is provided with at least one recess before the integral joining of the strip edges.
Claims4
A method for producing a drill shaft for a wet drill bit, wherein the wet drill bit produces a borehole having a borehole diameter and a drilled core having a core diameter, comprising the steps of:
- forming N, wherein N≥1, strip materials into a tubular body by integrally joining respective strip edges of the strip materials by N connection welds;
- and
- providing at least one of the strip materials with at least one recess before the integrally joining, wherein the at least one recess is disposed a distance from the connection welds, wherein at least one of the at least one recess is provided on an inside of the tubular body, and wherein clean cooling and flushing fluid is transportable by the at least one of the at least one recess provided on the inside of the tubular body.
Dependencies are inferred from the claim text.